TS EAMCET 2017 Code A Solved Paper

Section: Mathematics

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Question : 53 of 160

Marks: +1, -0

If

→

a

‌and‌

→

b

are unit vectors and α is the angle between them, then

→

a

+

→

b

is a unit vector when cos α =

−
1
2
1
2
−
√3
2
√3
2

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